Oxidative stability of sesame oil (SO) prepared from sesame seeds roasted at 213, 230, and 247C for each
14, 21, or 28 min was determined at 180C heating condition by 2,2-diphenyl-1-picrylhydrazyl (DPPH),
conjugated dienoic acid (CDA) value, headspace oxygen analysis, and profile changes of sesamol and sesamolin. As sesame seeds were roasted with longer time and higher temperature, more sesamol was found
in SO. SO from sesame seeds roasted at 247C for 28 min had the highest oxidative stability based on the
results of CDA and headspace oxygen. Absorbance of DPPH from SO roasted at 230 and 247C showed
different patterns compared to those from SO at 213C during thermal oxidation. Sesamol was continuously generated with the decrease of sesamolin in SO from 230 to 247C while sesamol in SO from 213C
did not increase during 180C heating. Higher oxidative stability of SO may be related with the continuous generation of sesamol from the degradation of sesamolin during thermal oxidation rather than the
initial antioxidant content.
Oxidative stability of sesame oil (SO) prepared from sesame seeds roasted at 213, 230, and 247C for each14, 21, or 28 min was determined at 180C heating condition by 2,2-diphenyl-1-picrylhydrazyl (DPPH),conjugated dienoic acid (CDA) value, headspace oxygen analysis, and profile changes of sesamol and sesamolin. As sesame seeds were roasted with longer time and higher temperature, more sesamol was foundin SO. SO from sesame seeds roasted at 247C for 28 min had the highest oxidative stability based on theresults of CDA and headspace oxygen. Absorbance of DPPH from SO roasted at 230 and 247C showeddifferent patterns compared to those from SO at 213C during thermal oxidation. Sesamol was continuously generated with the decrease of sesamolin in SO from 230 to 247C while sesamol in SO from 213Cdid not increase during 180C heating. Higher oxidative stability of SO may be related with the continuous generation of sesamol from the degradation of sesamolin during thermal oxidation rather than theinitial antioxidant content.
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